Internet and Web is a chapter in the CBSE Class 12 Informatics Practices syllabus from Informatics Practices. This chapter hub brings together revision notes, practice questions, worksheets, flashcards to help students learn, practice, and revise Internet and Web effectively.
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NCERT Class 12 Informatics Practices Chapter 5: Internet and Web (Pages 137–166)
CBSE
Class 12
Informatics Practices
Informatics Practices
5
137–166
6 study resources
Download the Internet and Web revision guide with key points, summaries, and quick revision notes for CBSE Class 12 Informatics Practices.
Key Points
Define a network.
A network is an interconnection of two or more devices allowing data sharing.
Types of Networks: LAN, MAN, WAN.
LAN connects devices over a limited area; MAN covers a city; WAN spans long distances.
Modem Functionality.
Modems modulate and demodulate signals for data transmission over networks.
Functions of a switch.
A switch connects devices and filters traffic by sending data only to the intended devices.
What is a router?
A router forwards data packets between networks and determines optimal routing paths.
Mesh Topology Advantages.
In mesh topology, each device connects to all others, enhancing reliability and traffic handling.
Star Topology Characteristics.
In star topology, all devices connect to a central hub, offering efficiency but a single point of failure.
What is HTTP/HTTPS?
HTTP retrieves web pages; HTTPS is the secure version using encryption for data safety.
Definition of URL.
A URL (Uniform Resource Locator) uniquely identifies a web resource’s location and access method.
Difference: Static vs Dynamic Web Pages.
Static pages display the same content to all; dynamic pages show varied content based on user input.
What are Cookies?
Cookies are text files stored by the browser that retain user preferences and session info.
Role of Web Server.
Web servers store, process, and deliver web content to clients upon HTTP requests.
Electromagnetic Spectrum in Networks.
Wired networks use cables; wireless ones use airwaves, each having unique transmission characteristics.
Ethernet for LAN.
Ethernet defines protocols for data transmission within a LAN, ensuring fast and efficient communication.
Essential Network Devices.
Key devices include modems, switches, routers, and gateways, facilitating connectivity and data flow.
VoIP Explained.
Voice over Internet Protocol allows voice calls through the Internet, converting analog signals to digital.
What is Web Hosting?
Web hosting provides server space to store website files, making them accessible online.
Real-world applications of the Internet.
The Internet supports services like email, social networking, e-commerce, and online education.
Browser Add-ons vs Plug-ins.
Add-ons enhance functionality; plug-ins are standalone programs that add capabilities to browsers.
Network Security Essentials.
Implementing firewalls and regular updates improves security across all types of networks.
Search Engines and Web Access.
Search engines like Google allow users to find web pages efficiently using keywords.
Practice important questions and exam-style problems from Internet and Web. These questions cover key topics from the CBSE Class 12 Informatics Practices syllabus.
How to practice: Start with the questions below to test your understanding of Internet and Web. Use the revision guide to review concepts you find difficult, then come back and retry the questions for better retention.
What does LAN stand for in networking?
Which of the following is a characteristic of MAN?
What is the main function of a Wide Area Network (WAN)?
Which of the following best describes a Local Area Network?
What type of network would you use to connect multiple devices in a small office setting?
In a LAN, the data transfer rate can vary from 10 Mbps to 1000 Mbps. What does Mbps stand for?
What is an example of a Metropolitan Area Network?
Which network type would most likely be used for a university campus?
Which of the following networks allows the highest speed for data transfer?
What type of network is primarily used for connecting devices in a single room?
What is one advantage of using a LAN over a WAN?
Which network may be used for connecting commuters of one city to the Internet?
What type of network environment do universities usually employ to ensure students can access shared resources?
In terms of data transfer rates, how does WAN generally compare to LAN?
Which type of network allows for device interconnectivity over hundreds of kilometers?
A city-wide Wi-Fi network primarily serves which type of network?
What is the primary function of a computer network?
Which of the following is NOT a type of network topology?
What type of network connects computers over large geographic distances?
What device filters and forwards data packets between computer networks?
Which protocol is primarily used for transferring files over the Internet?
In a client-server architecture, the client is responsible for?
What does LAN stand for in computer networking?
Which topology is characterized by a single central cable to which all network devices are connected?
Which device is used to connect different networks and facilitate network communication?
Which definition best describes a network?
Which of the following is an example of a WAN?
What is a common advantage of using a star topology?
Which network type is most suitable for connecting personal devices within a short range?
The term 'bandwidth' in networking refers to?
Which of the following is a disadvantage of a mesh topology?
What is one disadvantage of utilizing a client-server architecture?
What is the main characteristic of a mesh topology?
Which topology allows data to be transmitted only in one direction?
A bus topology is primarily connected through what?
What is a disadvantage of mesh topology?
Which topology is considered more secure due to its unique direct connections?
In a star topology, which device acts as a central point for communication?
How many connections are needed to fully connect a mesh topology of n nodes?
Which of the following topologies is typically the easiest to install?
What is a key drawback of the bus topology?
Which topology is known for its redundancy and reliability?
In a ring topology, what happens if one node fails?
Which of the following is NOT a common type of network topology?
What does a modem do?
Which device is primarily used to connect multiple devices within a Local Area Network (LAN)?
What is the main function of a router in a network?
Which of the following is a characteristic of a switch?
Which device regenerates signals in a network to extend its reach?
A gateway is primarily used to:
Which of the following devices can combine the functionality of a modem and router?
What defines a Local Area Network (LAN)?
What does a network switch operate at?
Which network device can manage traffic between different IP networks?
What is the primary purpose of a repeater in a network?
In a network, what role does a hub play?
Which of the following statements is correct regarding a modem?
When is a bridge used in a network?
Which device typically connects the local network to the Internet?
What does the term 'modem' stand for?
Which device connects multiple computers within a local network and filters traffic?
What is the primary function of a web server?
Which of the following protocols is primarily used for transferring web pages?
Which device in a network determines the best path for data to travel?
What information does a URL typically contain?
In web development, which language is primarily used for structuring web pages?
Which of the following devices can extend the range of a network by amplifying the signal?
Which term describes the physical layout of a network?
What is one function of a gateway in a network?
Which web browser is known for being open-source and free?
How does a web server respond to a request for a web page?
What role does CSS play in web development?
Which of the following accurately describes bandwidth in networking?
What type of network topology has a central hub with nodes connected to it?
Which of the following is a primary application of the World Wide Web?
What does URL stand for in the context of the Internet?
Which protocol is primarily used for sending emails over the Internet?
Voice Over Internet Protocol (VoIP) is primarily used for what purpose?
Which of the following is NOT a characteristic of chat applications?
Which technology is essential for creating web pages?
What is one primary benefit of using the Internet for education?
The service that allows for synchronous communication between users on the Internet is called:
Which of the following describes a social network?
What is a common use of the Internet in the context of e-commerce?
Which of the following is a characteristic feature of a Web Server?
In terms of the Internet, what does the term 'bandwidth' refer to?
Which application allows users to share videos over the Internet?
Tim Berners-Lee is known for inventing which Internet technology?
Which internet service would you use for real-time audio and video calls?
What is the primary language used to create static web pages?
Which file extension is commonly associated with static web pages?
What does the acronym URL stand for?
What does a web server do?
Which of the following is a function of a web server?
Which statement correctly describes a static web page?
Which protocol is primarily used for transferring web pages over the Internet?
What is the purpose of HTTP in web communication?
What is a web browser primarily used for?
How does a web server respond to a browser request?
Which of the following statements about websites is true?
Which of the following is NOT a component of a web server?
What does DNS stand for in the context of websites?
Which of the following is an example of a dynamic web page?
Which of the following is NOT a typical web browser?
What does CSS stand for, and what is its primary use?
What kind of content can modern web browsers display?
What does the term 'hosting' refer to in web development?
How does a web server respond to a browser's HTTP request?
What is the role of a web browser?
What is a cookie in the context of web browsing?
Which HTML tag is used to create hyperlinks?
Which of the following is necessary for hosting a website?
What is the primary difference between static and dynamic web pages?
Which technology enables users to send requests from their browser to a server?
In web development, which protocol is commonly used for secure communication?
What distinguishes a website from a web page?
What occurs when a browser requests a non-existent web page?
What does it mean for a website to be dynamic?
What is the primary advantage of using a content management system (CMS) for websites?
Which of the following is a best practice for organizing website content?
What is the role of CSS in web development?
Which of the following web technologies is used for server-side programming?
What is a common security feature for websites?
What is the primary purpose of web hosting?
Which component is essential for mapping a domain name to an IP address?
When hosting a website, what must be done after uploading website files to a server?
Which of the following is NOT a common service provided by web hosting providers?
Which type of hosting involves sharing server resources with other websites?
What must be done to ensure website access once a domain name is registered?
Why is it essential to choose a reliable web hosting provider?
What information is required to create logins for managing web space?
What is typically the first step in hosting a website?
What is the primary function of a web server?
In which hosting type do you have exclusive access to the server?
Which of the following protocols does a web server primarily use to communicate with web browsers?
What feature is included in cloud hosting that differs from traditional hosting?
What does DNS stand for in the context of web servers?
What does DNS stand for in the context of hosting?
How does a web server respond to a request for a dynamic web page?
Which of the following is a potential drawback of shared hosting?
Which programming language is commonly associated with creating dynamic web pages?
What signifies an uptime guarantee in web hosting?
When a web browser sends an HTTP request to a web server, it typically includes which of the following?
What kind of information is typically included in a user agreement with a hosting provider?
What type of web page is primarily generated using server-side scripts?
Which of the following actions is NOT necessary for maintaining a hosted website?
Which statement is true regarding web servers and clients?
In web hosting, what does the term 'bandwidth' refer to?
What is a potential drawback of static web pages hosted on a web server?
Why is it important for a web server to be connected to the Internet?
What does the acronym HTTP stand for?
What role does the unique domain name play in a web server's functionality?
Which of the following statements best describes how a web server handles multiple requests?
Why might a dynamic web page take longer to load than a static web page?
Which of the following technologies is most often used to host a web server?
Which of the following is a feature of a web browser?
What is a common file extension for static web pages?
What is the primary purpose of the 'Privacy and Security' panel in Firefox?
In which step do browsers call an application program?
What does the 'General' panel in Firefox allow users to configure?
What does HTTP stand for in the context of web browsers?
What is a dynamic web page?
What happens when a browser renders a webpage?
Which feature is NOT commonly associated with web browsers?
Which panel allows users to set the default search engine in Firefox?
What is one advantage of using open-source web browsers like Mozilla Firefox?
Which of the following is a potential security feature found in web browsers?
Which component of the web browser is responsible for managing the display of web pages?
What is the primary role of cookies in web browsers?
Why is it important to keep a web browser updated?
Download and practice Internet and Web worksheets to improve problem-solving accuracy and speed for CBSE Class 12 Informatics Practices exams.
This worksheet covers essential long-answer questions to help you build confidence in Internet and Web from Informatics Practices for Class 12 (Informatics Practices).
Questions
Define a computer network. Discuss the importance of networks in daily life.
A computer network is defined as an interconnection of two or more computers that allows them to share resources and communicate. Networks play a crucial role in daily life by enabling information exchange, communication through emails and instant messaging, and resource sharing like printers and internet access. For instance, in a workplace, a network allows employees to collaborate effectively by sharing documents and applications.
Explain the different types of networks (LAN, MAN, and WAN) with examples.
LAN (Local Area Network) connects computers within a limited area, like a home or office, typically covering distances up to 1 km. Examples include home Wi-Fi networks. MAN (Metropolitan Area Network) spans a city or town, connecting multiple LANs; an example would be a city's cable TV network. WAN (Wide Area Network) covers broad geographical areas, connecting LANs and MANs globally; the Internet is the largest WAN. Each type of network serves different needs based on scale and geography.
What is the role of a modem in a computer network? Explain its function and working.
A modem, short for Modulator-Demodulator, is an important device in computer networks that converts digital data from a computer into analog signals for transmission over telephone lines and vice versa. Its function includes modulation at the sending end, which converts digital signals to analog, and demodulation at the receiving end, which converts them back to digital. This enables computers to connect to the Internet via broadband or dial-up connections, allowing access to online resources and communication.
Describe the functions of switches and routers in a network.
A switch is a networking device that connects devices within a LAN and uses MAC addresses to forward data only to the intended device, making it efficient in managing data traffic. It allows multiple devices to communicate simultaneously without collision. A router, on the other hand, connects different networks, such as a LAN to the Internet, and uses IP addresses to route data. It analyzes incoming data packets and determines the best path for the information, enabling communication across varied networks.
What is the World Wide Web (WWW)? Discuss its key components.
The World Wide Web, commonly referred to as the Web, is a system of interlinked hypertext documents accessed via the Internet. Key components include HTML (HyperText Markup Language), which structures web pages; URLs (Uniform Resource Locators) that provide addresses for these pages; and HTTP (HyperText Transfer Protocol), which governs the transfer of data on the Web. Together, they enable users to access and share vast information online efficiently.
Explain the concept of web pages and the differences between static and dynamic web pages.
A web page is a document available on the World Wide Web, typically created using HTML and viewed in a web browser. Static web pages display the same content to every user and do not change without manual updates. They are simple and faster to load. In contrast, dynamic web pages can change content based on user interactions or data retrieved from servers. They are generated in real-time, making them more complex but allowing personalized experiences, such as user dashboards or e-commerce sites.
Discuss the process of hosting a website, including key steps involved.
Hosting a website involves several steps: First, select a web hosting service provider that meets your needs, considering factors like storage and bandwidth. Next, choose and register a domain name that represents your site. After securing web space, organize and upload website files (HTML, CSS, etc.) to the server. The domain name must be linked to the server's IP address via the Domain Name System (DNS) to make the website accessible online.
What are cookies? Explain their purpose in web browsing.
Cookies are small text files stored by the browser on a user's device, containing information about the user's browsing sessions. They enhance user experience by remembering login details, personal preferences, and shopping cart items. Cookies can also be used for tracking user behavior for analytics and targeted advertising. While beneficial, they raise privacy concerns; hence browsing settings allow users to manage cookie permissions.
Elaborate on the functionality of a web browser and its importance in web access.
A web browser is a software application that retrieves and displays web content, enabling users to navigate the Internet. Key functions include rendering HTML documents, managing bookmarks, and executing script files (like JavaScript) for interactive features. Browsers also enhance security through features like pop-up blockers and privacy settings. They are essential for accessing the vast resources of the web, making it user-friendly and interactive.
This worksheet challenges you with deeper, multi-concept long-answer questions from Internet and Web to prepare for higher-weightage questions in Class 12.
Questions
Explain the differences between LAN, MAN, and WAN. Discuss the applications and limitations of each type.
LAN connects devices within a small area like a home or office, offering high speeds and low costs. MAN links LANs across a city, providing moderate speeds and higher costs. WAN connects devices over larger geographical areas, such as countries, with lower speeds and greater costs. Applications: LAN for local communication, MAN for city-wide services, WAN for global connectivity. Limitations include range and speed constraints for LAN and MAN, and high costs for setup and maintenance in WANs.
Describe the role and functioning of networking devices such as routers and switches. How do they differ in their functionality?
Routers connect different networks, directing data packets based on IP addresses, while switches operate within a single network, forwarding data to specific devices based on MAC addresses. Routers manage traffic between networks and provide security, while switches enhance efficiency in a local network.
Discuss the differences between static and dynamic web pages in terms of their structure, content generation, and user interaction.
Static web pages display the same content to every user and are coded in HTML only, while dynamic pages can change content based on user inputs or database interactions, often using languages like PHP or JavaScript. Static pages are simpler and quicker to load; dynamic pages require server-side processing, enhancing interactivity.
What is VoIP? Explain its advantages and potential drawbacks compared to traditional telephony.
Voice over Internet Protocol (VoIP) allows voice communication over the Internet. Advantages include cost-effectiveness and mobility; calls can be made from any Internet-enabled device. Drawbacks involve dependency on Internet connection quality, where poor connectivity can degrade call quality.
Explain the process of hosting a website. What steps must be taken to register a domain and ensure accessibility?
To host a website, choose a hosting provider and register a domain name. Upload website files to the host server and map the domain name to the server's IP address. Finally, configure DNS settings to ensure users can reach the site using the domain name.
Compare and contrast the roles of servers and clients in a network, focusing on their interaction and data exchange.
Servers provide resources and services to clients that request them. Clients initiate requests, whereas servers respond to those requests, processing data according to client needs. The interaction defines a client-server model fundamental to internet functioning.
Analyze the internet as a wide area network. What factors contribute to its scalability and resilience?
The internet is a global WAN consisting of interconnected routers, servers, and various networking technologies. Factors include redundant data paths, multiple protocols for addressing and routing, and robust infrastructure capable of adapting to loads and failures.
What are cookies, and how do they enhance user experience on the web? Discuss privacy concerns associated with their use.
Cookies are small data files stored by browsers to remember user preferences, login states, and activity across sessions. They enhance user experience by personalizing content; however, they also raise privacy concerns regarding tracking and data sharing without user consent.
Explain the structure of a URL. What is the significance of each of its components?
A URL consists of the protocol (http or https), domain name, path, and optional parameters. The protocol indicates how data should be transmitted; the domain specifies the site location; the path indicates specific resources, and parameters can pass additional settings to a webpage.
Discuss the impact of modern web browsers on web page retrieval and user experience. How do they contribute to web interactivity?
Modern browsers support advanced features, including JavaScript execution for dynamic content, CSS for styling, and plug-ins for enhanced capabilities. They enable smoother navigation and interactive elements on web pages, greatly improving the user experience.
The final worksheet presents challenging long-answer questions that test your depth of understanding and exam-readiness for Internet and Web in Class 12.
Questions
Analyze the impact of rapid internet expansion on education in developing countries. Consider both benefits and challenges.
Examine how internet access enhances educational opportunities but also explore issues such as digital divide and content quality.
Evaluate the effectiveness of various networking topologies (star, mesh, ring) in different organizational contexts.
Discuss how the choice of topology can affect performance, costs, and scalability of a network. Provide examples.
Discuss the role of web browsers in shaping user experience on the Internet, including their functionalities and limitations.
Explore features like privacy settings, extensions, and user interface while mentioning potential drawbacks like security vulnerabilities.
Critically assess the security measures associated with VoIP communications. What vulnerabilities exist and how can they be mitigated?
Identify specific security protocols involved in VoIP and discuss possible security breaches and their implications.
Explore the implications of dynamic versus static web pages for e-commerce websites. Which is more advantageous and why?
Analyze how each type of web page affects user interaction, site maintenance, and SEO.
Investigate the environmental impact of data centers required for hosting websites. Discuss sustainable options available.
Examine energy consumption, cooling systems, and waste, then propose alternatives or improvements to enhance sustainability.
Evaluate the role of cookies in enhancing user experience on the web, alongside the potential privacy concerns they raise.
Discuss how cookies personalize services while highlighting user privacy issues and potential risks.
Examine how the Internet has transformed social networks into key platforms for political engagement and activism.
Analyze the interaction between digital platforms and real-world advocacy, including successes and challenges.
Analyze the ethical implications of web hosting services that cater to harmful content. What responsibilities do hosting services have?
Discuss the balance between freedom of speech and the responsibility to prevent harm. Provide examples.
Assess how the deployment of 5G technology may impact internet accessibility and speed. What are potential benefits and drawbacks?
Evaluate improvements in connectivity and potential issues like infrastructure costs and health concerns.
Explore the essential concepts of internet and web technologies in Class 12 Informatics Practices, including computer networks, their types, networking devices, and the applications of the internet.
Download worksheets, revision guides, formula sheets, and the official textbook PDF for Internet and Web.
Internet and Web Official Textbook PDF
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Internet and Web Revision Guide
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Internet and Web Practice Worksheet
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Internet and Web Mastery Worksheet
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Internet and Web Challenge Worksheet
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Internet and Web Question Bank
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